Electronic component mounting apparatus, and power supply control method executed by the electronic component mounting apparatus

ABSTRACT

The present invention provides an electronic component mounting apparatus which can reduce a consumption power amount in comparison with the background art, and a power supply control method which is executed by the electronic component mounting apparatus. A drive power source and a control power source are separately connected and shut-off in accordance with a command from a control device ( 104 ) to each of component feed drive parts ( 107 A,  107 B) for driving component feed devices ( 101 A,  101 B), a component transfer drive device ( 108 ) for driving a component transfer device ( 102 ), and a circuit board positioning drive device ( 109 ) for driving a circuit board positioning device ( 103 ). The control device detects an individual occurrence of halt condition of each of constitution parts of an electronic component mounting apparatus ( 100 ) and shuts off the drive power source to the drive device in the halt condition. Thus, a wasteful power consumption is eliminated and the production is continued with a necessary minimum power.

TECHNICAL FIELD

[0001] The present invention relates to an electronic component mountingapparatus for mounting electronic components to mount positions onobjects to be mounted such as circuit boards or the like, and a powersupply control method executed by the electronic component mountingapparatus.

BACKGROUND ART

[0002]FIG. 7 illustrates a conventional electronic component mountingapparatus 50. The electronic component mounting apparatus 50 roughlycomprises component feed devices 1A, 1B for supplying electroniccomponents to be mounted to a circuit board 5; a component transferdevice 2 of a rotary type for holding the electronic components from thecomponent feed device 1A or component feed device 1B and mounting ontothe circuit board 5; a circuit board positioning device 3 for moving thecircuit board 5 so that a mount position on the circuit board 5 ispositioned at a ATTACHMENT B component hold release position of thecomponent transfer device 2; and a control device 4 for controllingthese component feed devices 1A, 1B, the component transfer device 2,and the circuit board positioning device 3 in association with eachother. The component feed devices 1A, 1B are driven by component feeddrive devices 7A, 7B respectively, the component transfer device 2 isdriven by a component transfer drive device 8, and the circuit boardpositioning device 3 is driven by a circuit board positioning drivedevice 9. In the electronic component mounting apparatus 50 of theconstitution, as indicated in FIG. 8, a power source to the componentfeed devices 1A, 1B, the component transfer device 2, the circuit boardpositioning device 3, and the control device 4 is connected, shut off bya power source panel 6 and a source connection circuit incorporated inthe panel via the component feed drive devices 7A, 7B, the componenttransfer drive device 8, and the circuit board positioning drive device9 respectively.

[0003] The connection and shut-off of the power source are generallycarried out in an order shown in flow charts of FIG. 9. The power source50 is connected when the electronic component mounting apparatus 50 isin use, and disconnected when the electronic component mountingapparatus 50 is finished to be used at termination of a sequence ofproduction operations or on the occasion of maintenance. In some of theelectronic component mounting apparatuses, all or part of the componentfeed devices are adapted to supplement components during the productionwith an aim for a long-time production, and in this case the powersource is disconnected to the drive device for the component feed deviceto which the components are supplemented. This is generally intended tosecure safety of workers handling the electronic component mountingapparatus.

[0004] Meanwhile, saving resources and energy has become an issue to betackled in each of industrial fields from a viewpoint of protecting theearth environment. Thus, in the electronic component mounting apparatus,cut back of a consumption power at the whole of facilities or per unitproduction amount is grappled. On the other hand, an improvement inproduction capacity per unit time is demanded to the electroniccomponent mounting apparatus, which leads to an increase of a currentconsumed at each of drive devices. In general, while an operation speedof each drive device is unavoidably raised so as to increase theproduction capacity per unit time, this requires to make a constructionincluding the drive device light in weight and increase a capacity of anelectric motor or the like used in the drive device. The powerconsumption increases in accordance with the increase in capacity of theelectric motor, etc., so, the aim of improving the production capacityand saving energy is contradictory to each other.

DISCLOSURE OF INVENTION

[0005] The present invention is devised to solve the problem and anobject of the present invention is to provide an electronic componentmounting apparatus and a method executed by the electronic componentmounting apparatus for controlling power supply whereby a consumptionpower amount can be reduced as compared with the background art.

[0006] In accomplishing these and other aspects, according to a firstaspect of the present invention, there is provided an electroniccomponent mounting apparatus, which comprises:

[0007] a component feed device for supplying electronic components to bemounted on a mount object which has a drive power source device for thefeed device for supplying a driving electric power for the componentfeed device and a control power source device for the feed device forsupplying an operation control electric power for the component feeddevice;

[0008] a component transfer device for holding the electronic componentsfrom the component feed device and mounting onto the mount object whichhas a drive power source device for the transfer device for supplying adriving electric power for the component transfer device and a controlpower source device for the transfer device for supplying an operationcontrol electric power for the component transfer device; and

[0009] a control device for controlling operations of the component feeddevice and component transfer device,

[0010] wherein based on a detection of the control device that theelectronic component mounting apparatus is at a halt in an operationbecause of the other reason than a shutoff of power supply to theelectronic component mounting apparatus, in at least one of the drivepower source devices for the feed device and the transfer device of thecomponent feed device, the control device shuts off the power supply tothe drive power source device thereof while maintaining the power supplyto the control power source device thereof.

[0011] In the first aspect, the halt condition detected by the controldevice may result from a maintenance work to the electronic componentmounting apparatus, a component shortage at the component feed device, await mode for the mount object to be carried to the electronic componentmounting apparatus, or an operation failure in at least one of thecomponent feed device and the component transfer device.

[0012] In the first aspect, in the wait mode for the mount object, basedon a cancel of the wait mode, the control device may resume theoperations of the component feed device and component transfer devicewithout a judgment by a worker.

[0013] In the first aspect, the control device may detect the haltcondition based on output information from encoders equipped at thecomponent feed device and the component transfer device.

[0014] According to a second aspect of the present invention, there isprovided a power supply control method carried out by an electroniccomponent mounting apparatus which mounts electronic components (111) ona mount object (105), the power supply control method comprising:

[0015] detecting an operation halt condition because of the other reasonthan a shutoff of power supply to the electronic component mountingapparatus; and

[0016] after the detection, shutting off a supply of a driving electricpower to a part in the operation halt condition constituting theelectronic component mounting apparatus while a supply of an operationcontrol electric power is maintained to the part of the electroniccomponent mounting apparatus.

[0017] In the electronic component mounting apparatus according to thefirst aspect of the present invention and in the method for controllingthe power supply according to the second aspect of the presentinvention, the control device is arranged in the electronic componentmounting apparatus and detects the drive device which stops operatingbecause of some other reason than the shutoff of the power supply to theelectronic component mounting apparatus. And then the control deviceshuts off the power supply for driving the drive device whilemaintaining the power supply for controlling the operation of the drivedevice to the stopping drive device of the electronic component mountingapparatus. Since the drive power source is shut off to the stoppingdrive device, the wasteful power consumption is eliminated and theproduction is continued with the necessary minimum amount of power.

BRIEF DESCRIPTION OF DRAWINGS

[0018] These and other aspects and features of the present inventionwill become clear from the following description taken in conjunctionwith the preferred embodiments thereof with reference to theaccompanying drawings, in which:

[0019]FIG. 1 is a schematic diagram showing a control system in which acontrol device set to an electronic component mounting apparatusaccording to an embodiment of the present invention connects, shuts offa power source to each drive device;

[0020]FIG. 2 is a diagram schematically showing the constitution of theelectronic component mounting apparatus of the embodiment including thecontrol system of FIG. 1;

[0021]FIG. 3 is a flow chart explanatory for the operation in a powersupply control method executed by the electronic component mountingapparatus of FIG. 2;

[0022]FIG. 4 is a conceptional graph indicating a change in consumptionpower amount of the electronic component mounting apparatus of FIG. 2and a conventional electronic component mounting apparatus;

[0023]FIG. 5 is a diagram showing the structure of a component feeddrive device shown in FIG. 1;

[0024]FIG. 6 is a perspective view showing the structure of a circuitboard positioning drive device of FIG. 1;

[0025]FIG. 7 is a schematic diagram of the constitution of aconventional electronic component mounting apparatus;

[0026]FIG. 8 is a schematic diagram of a control system in theconventional electronic component mounting apparatus of FIG. 7; and

[0027]FIG. 9 is flow charts explanatory for the operation at theconnection, shutoff times of a power source in the conventionalelectronic component mounting apparatus of FIG. 7.

BEST MODE FOR CARRYING OUT THE INVENTION

[0028] An electronic component mounting apparatus which is an embodimentof the present invention and a power supply control method executed bythe electronic component mounting apparatus will be described below withreference to the drawings. The same parts are designated by the samereference numerals throughout the drawings.

[0029] An example functioning as an “object to be mounted” described inthe foregoing “Disclosure Of Invention” corresponds to a circuit boardin the embodiment. However, the object to be mounted is not restrictedto this and covers conceptually circuit boards or the like having, forexample, a liquid crystal display part.

[0030]FIG. 1 shows an electronic component mounting apparatus 100according to the embodiment. The electronic component mounting apparatus100 roughly comprises component feed devices 101A, 101B movable in an Xdirection for supplying electronic components 111 to be mounted to acircuit board 105; a rotary type component transfer device 102 forholding the electronic components 111 from the component feed device101A or component feed device 101B and mounting the held electroniccomponents 111 on the circuit board 105; a circuit board positioningdevice 103 for moving the circuit board 105 in X, Y directionsorthogonal to each other so that a mount position on the circuit board105 is positioned at a component hold release position of the componenttransfer device 102; and a control device 104 for controlling thecomponent feed devices 101A, 101B, the component transfer device 102,and the circuit board positioning device 103 in association with eachother.

[0031] The component feed devices 101A, 101B are driven by componentfeed drive devices 107A, 107B, the component transfer device 102 isdriven by a component transfer drive device 108, and the circuit boardpositioning device 103 is driven by a circuit board positioning drivedevice 109.

[0032] Since the electronic component mounting apparatus 100 has twocomponent feed devices 101A, 101B as above, a component mount operationis continued with the use of electronic components 111 present in one ofthe component feed devices even if the other component feed devicebecomes short of the components.

[0033] The component transfer device 102 takes out predeterminedelectronic components 111 from the component feed device 101A orcomponent feed device 101B in response to a command of the controldevice 104 and transfers the electronic components 111 to the circuitboard placed at the circuit board positioning device 103. During thetime after the electronic components 111 are taken out before theelectronic components are transferred onto the circuit board, holdstates or hold postures of the electronic components 111 by thecomponent transfer device 102 are detected with the utilization of asensor or an image recognition device. The component transfer devicecorrects the hold postures of the electronic components 111 on the basisof the detected information, so that the electronic components arecorrectly mounted on the electronic circuit board.

[0034] Each of the component feed drive devices 107A, 107B isconstructed in a constitution as shown in FIG. 5. The component feeddrive device 107A will be discussed by way of example, but the samedescription is applied to the component feed drive device 107B. Thecomponent feed drive device 107A includes a table 1074 where thecomponent feed device 101A is loaded, a ball screw 1075 extending in theX direction, and a linear guide 1076 extending in the X direction forguiding a movement of the table. The table 1074 has a nut 1077 which isengaged with the ball screw 1075 and to which a hollow motor 1078 and anencoder 1073 are set into one body. The table is moved in the Xdirection by the hollow motor 1078 as a driving part. The encoder 1073which sends a signal indicating a movement amount of the table as anexample of a detection device for detecting an operation state of thefeed device is connected to the control device 104.

[0035] The component transfer drive device 108 is a structure, withincluding a motor 1084 as a driving part for rotating the componenttransfer device 102 in the clockwise direction shown by an arrow as inFIG. 2 and, an encoder 1083 as an example of a detection device fordetecting an operation state of the transfer device and which detectsand sends a revolution number of an output shaft of the motor 1084. Theencoder 1083 is connected to the control device 104.

[0036] As indicated in FIG. 6, the circuit board positioning drivedevice 109 has a ball screw 1094 extending in the X direction; a motor1095 as a driving part for rotating the ball screw 1094 in a directionabout an axis of the ball screw 1094; an encoder 1093×as an example of acircuit board positioning device operation state detection device fordetecting a revolution number of an output shaft of the motor 1095 andsending the revolution number as a movement amount in the X direction; aball screw 1096 extending in the Y direction; a motor 1097 as a drivingpart for rotating the ball screw 1096 in a direction about an axis ofthe ball screw 1096; and an encoder 1093Y as the other example of thecircuit board positioning device operation state detection device fordetecting a revolution number of an output shaft of the motor 1097 andsending the revolution number as a movement amount in the Y direction.The encoders 1093A, 1093Y are connected to the control device 104.

[0037] Each of the component feed drive devices 107A, 107B, thecomponent transfer drive device 108, and the circuit board positioningdrive device 109 has a drive power source device for supplying electricpower for driving to each of the above drive devices, and a controlpower source device for supplying electric power for controlling to eachof the above drive devices. More specifically, the component feed drivedevice 107A has a drive power source device 1071A for the first feeddevice for feeding the electric power to the hollow motor 1078, and acontrol power source device 1072A for the first feed device. Thecomponent feed drive device 107B has a drive power source device 1071Bfor the second feed device for feeding the electric power to the hollowmotor 1078 and a control power source device 1072B for the second feeddevice. The component transfer drive device 108 has a drive power sourcedevice 1081 for the transfer device for feeding the electric power tothe motor 1084 and a control power source device 1082 for the transferdevice. The circuit board positioning drive device 109 has a drive powersource device 1091 for the positioning device for feeding the electricpower to the motors 1095, 1097 and a control power source device 1092for the positioning device.

[0038] The reason why the drive power source devices 1071A, 1071B, 1081,1091, and the control power source devices 1072A, 1072B, 1082, 1092 areset separately is to prevent positioning information on each drivedevice 107A, 107B, 108, 109 from being lost when the power supply onlyto the drive power source devices 1071A, 1071B, 1081, 1091 is shut offwhile the power supply to the control power source devices 1072A, 1072B,1082, 1092 is maintained, and also to let a control part, etc. operateto prevent a displacement or drop at the feed devices, the transferdevice, and/or the positioning device because of its or their ownload(s) or the like subsequent to the shutoff of the drive power source.

[0039]FIG. 1 depicts the connection for the control from the controldevice 104 to the drive devices 107A, 107B, 108, 109, component feeddevices 101A, 101B, component transfer device 102, and circuit boardpositioning device 103 via the power source devices, while the otherconnection is not illustrated to avoid complexity.

[0040] The electric power is supplied from a power source panel 106 toeach of the drive power source device 1071A for the first feed device,the control power source device 1072A for the first feed device, thedrive power source device 1071B for the second feed device, the controlpower source device 1072B for the second feed device, the drive powersource device 1081 for the transfer device, the control power sourcedevice 1082 for the transfer device, the drive power source device 1091for the positioning device and the control power source device 1092 forthe positioning device, and the control device 104.

[0041] Each of the drive power source device 1071A, the drive powersource device 1071B, the drive power source device 1081, and the drivepower source device 1091 has a connection-shutoff function to connect,disconnect the power source. The control device 104 controls the powersupply to each of the drive power source device 1071A, the drive powersource device 1071B, the drive power source device 1081, and the drivepower source device 1091 on the basis of output information from thecorresponding encoder 1073A, 1073B, 1083, and 1093. This controloperation will be detailed later.

[0042] In the meantime, the electric power is kept supplied from thepower source panel 106 to each of the control power source device 1072A,the control power source device 1072B, the control power source device1082, and the control power source device 1092 except when the powersupply to the electronic component mounting apparatus 100 is shut off.

[0043] A method for controlling the power supply to each drive device107A, 107B, 108, and 109 which is carried out by the control device 104among other operations in the above-constituted electronic componentmounting apparatus 100 will be discussed hereinbelow.

[0044] In step (designated by “S” in FIG. 3) 1 in FIG. 3, the powersource of the electronic component mounting apparatus 100 is turned on.In the state, the control device 104 outputs commands to each of thedrive devices 107A, 107B, 108, and 109 to connect the correspondingdrive power source device 1071A, 1071B, 1081, and 1091. The controldevice 104 repeatedly makes judgements in steps 2 through 6 based onsignals from the encoders 1073A, 1073B, 1083, and 1093. Operations inthese steps will be described herein. A judgment order in the steps 2-6is not limited to the embodiment and not particularly specified.

[0045] In step 2, the control device 104 judges whether or not theelectronic component mounting apparatus 100 is in a maintenance modesuch as a check mode or a machine model switch mode or the like. Inother words, in the maintenance mode with the power being supplied tothe electronic component mounting apparatus 100, when the maintenancework is performed, all of the component feed devices 101A, 101B, thecomponent transfer device 102, and the circuit board positioning device103 are at rest. Thus, a stop state signal is sent to the control device104 from the encoders 1073A, 1073B, 1083, 1093 of the apparatuses. Basedon the signals from the encoders 1073A, 1073B, 1083, 1093, in step 7,the control device 104 judges which of the drive devices stops. In step8, the control device 104 outputs a power source shutoff command(s) tothe corresponding drive power source device(s) for the drive device(s)judged to be in a halt. That is, since the component feed devices 101A,101B, the component transfer device 102, and the positioning device 103are all at rest in the maintenance mode, the control device 104 shutsoff the power supply to the corresponding drive power source devices1071A, 1071B, 1081, and 1091.

[0046] Upon completion of the maintenance work, following a stop staterelease operation by the worker in step 9, the control device 104outputs in step 10 drive power source connection commands to the drivepower source devices 1071A, 1071B, 1081, and 1091 to which the powersource shutoff commands has been output. The electronic componentmounting apparatus 100 is accordingly turned operable in step 11.

[0047] In step 3, in the wake of a component shortage at the componentfeed devices 101A, 101B, the component feed device in short ofcomponents moves to stop at a component replenishment position so thatelectronic components 111 are supplied. In accordance with signals sentfrom the encoders 1073A, 1073B as described earlier, the control device104 detects in step 7 which of the two component feed devices 101A, 101Bstops. The component feed device 101A is supposed here to be in short ofcomponents and at rest. In step 8, the control device 104 outputs thedrive power source shutoff command to the drive power source device1071A which is set to the component drive device 107A of the componentfeed device 101A at rest. The drive power source device 1071A shuts offthe drive power source in response to the drive power source shutoffcommand. The other drive devices 107B, 108, 109 naturally keep operatingat this time.

[0048] When the replenishment of electronic components 111 is completedat the component feed device 101A, in step 9, a replenishment completionsignal is supplied through the worker's manipulation to the controldevice 104. The control device 104 memorizes according to thereplenishment completion signal that the component feed device 101A isturned in a state to be operable. Simultaneously with the storage, thecontrol device 104 judges that the stop state of the component feeddevice 101A is freed, with outputting in step 10 the drive power sourceconnection command to the drive power source device 1071A for the firstfeed device. In consequence, the component feed device 101A is returnedto a production operation in step 11.

[0049] On the occurrence of a wait condition in a feeding of the circuitboards, since each drive device 107A, 107B, 108, and 109 is in a halt,the control device 104 checks the stopping drive devices in step 7 andoutputs the drive power source shutoff commands to each drive powersource device 1071A, 1071B, 1081, 1091 in step 8. Although theelectronic component mounting apparatus 100 is brought to a halt by theworker at the foregoing maintenance work, the electronic componentmounting apparatus 100 is stopped on the basis of a judgment by thecontrol device 104 in the above circuit board wait condition. Therefore,the electronic component mounting apparatus is restarted on the basis ofthe judgment by the control device 104, not the judgment by the worker.

[0050] In step 9, when the circuit board wait condition is relieved as aresult of the supply of circuit boards or the like, the control device104 detects from a circuit board feed detection sensor 1098 equipped inthe circuit board positioning drive device 109 that the circuit boardwait state is relieved. The control device outputs in step 10 the drivepower source connection commands to each drive power source device1071A, 1071B, 1081, and 1091 to which the drive power source shutoffcommands have been output, whereby the production is started again instep 11.

[0051] If any operation abnormality takes place in the electroniccomponent mounting apparatus 100 as in step 5, each drive device 107A,107B, 108, and 109 brought to a stop. Thus, the control device 104checks the stopping drive devices in step 7 and sends the drive powersource shutoff commands to each drive power source device 1071A, 1071B,1081, and 1091 in step 8. Such the operation stop because of someoperation abnormality is also performed on the basis of the judgment bythe control device 104. However, the operation is resumed by theworker's judgment, which is a difference from the above-discussedcircuit board wait condition.

[0052] In step 9, in response to the worker's manipulation to relievethe operation abnormality state, the control device 104 outputs thedrive power source connection commands to each of the drive power sourcedevices 1071A, 1071B, 1081, and 1091 to which the drive power sourceshutoff commands have been output. The production is resumed in step 11.

[0053] When the control device 104 detects the shutoff of the powersupply to the electronic component mounting apparatus 100 in step 6, thecontrol device 104 generates the power source shutoff commands to eachdrive power source device 1071A, 1071B, 1081, and 1091. In addition tothe shutoff commands by the control device 104, the power source panel106 works at the same time to shut off the power source, thus realizingan emergency stop function.

[0054] In the electronic component mounting apparatus 100 according tothe embodiment as above, the control device 104 recognizes the drivedevice in a halt on the basis of the output signal from at least one ofthe encoders 1073A, 1073B, 1083, and 1093 in various types of stopstates brought about during the operation of the electronic componentmounting apparatus 100. As a consequence, the control device 104 makesdrive power source device of the drive device in a halt stop to supplythe electric power to the drive part corresponding to the drive devicein the halt. Therefore, the power not used for the production isprevented from being consumed wastefully. A consumption amount of powerat the electronic component mounting apparatus 100 is reducedaccordingly and the production is continued with a necessary minimumpower.

[0055] More specifically, each of changes of total amounts of theconsumed power in each of the electronic component mounting apparatus100 and a conventional electronic component mounting apparatus is shownin a graph in FIG. 4. As is clear from the graph, although theconsumption amount at the normal operation is equal between theapparatuses, the electronic component mounting apparatus 100 consumesless power as compared with the conventional electronic componentmounting apparatus, for example, in the event that a stop state such asthe component shortage or the like is occurred. Accordingly, the largerthe number of the stop state becomes, the more the sum of the consumedpower is reduced in the electronic component mounting apparatus 100 thanin the conventional electronic component mounting apparatus.

[0056] Further, since the control device 104 orders the power sourceconnection and shutoff, it eliminates particularly complicate proceduresfrom the worker and surely saves energy. Moreover, since the drive powersource is shut off to the drive device in a halt, the worker's safety inhandling the drive device in a halt is enhanced in comparison with thebackground art.

[0057] In the present embodiment, the connection and disconnection tothe drive power source device 1071A, 1071B, 1081, 1091 for the drivedevice 107A, 107B, 108, 109 is realized at the drive power source device1071A, 1071B, 1081, 1091. However, the function may be incorporated inthe power source panel 106.

[0058] When the drive power source device 1071A, 1071B, 1081, 1091 is tobe connected to the power source, a wait time is required in some casesbefore the power source is turned to a stable operation state. Foravoiding this inconvenience, the control device 104 may be provided witha constant wait mode at the connection time of the power source or, thepower source panel 106 may be equipped with a notification function ofinforming that the power source is turned in the stable operation state.

[0059] Although the so-called rotary type electronic component mountingapparatus 100 is described by way of example in the foregoingembodiment, the present invention is not limited to this type and isapplicable to a robot type machine in which a transfer device whichcorresponds to the component transfer device 102 for holding andtransferring the electronic components 111 can move in the X, Ydirections.

[0060] The entire disclosure of Japanese Patent Application No.11-113560 filed on Apr. 21, 1999, including specification, claims,drawings, and summary are incorporated herein by reference in itsentirety.

[0061] Although the present invention has been fully described inconnection with the preferred embodiments thereof with reference to theaccompanying drawings, it is to be noted that various changes andmodifications are apparent to those skilled in the art. Such changes andmodifications are to be understood as included within the scope of thepresent invention as defined by the appended claims unless they departtherefrom.

1. An electronic component mounting apparatus, which comprises: acomponent feed device (101A, 101B) for supplying electronic components(111) to be mounted on a mount object (105) which has a drive powersource device for the feed device (1071A, 1071B) for supplying a drivingelectric power for the component feed device and a control power sourcedevice for the feed device (1072A, 1072B) for supplying an operationcontrol electric power for the component feed device; a componenttransfer device (102) for holding the electronic components from thecomponent feed device and mounting onto the mount object which has adrive power source device for the transfer device (1081) for supplying adriving electric power for the component transfer device and a controlpower source device for the transfer device (1082) for supplying anoperation control electric power for the component transfer device; anda control device (104) for controlling operations of the component feeddevice and component transfer device, wherein based on a detection ofthe control device that the electronic component mounting apparatus isat a halt in an operation because of the other reason than a shutoff ofpower supply to the electronic component mounting apparatus, in at leastone of the drive power source devices for the feed device and thetransfer device of the component feed device, the control device shutsoff the power supply to the drive power source device thereof whilemaintaining the power supply to the control power source device thereof.2. An electronic component mounting apparatus according to claim 1,wherein the halt condition detected by the control device results from amaintenance work to the electronic component mounting apparatus, acomponent shortage at the component feed device, a wait mode for themount object to be carried to the electronic component mountingapparatus, or an operation failure in at least one of the component feeddevice and the component transfer device.
 3. An electronic componentmounting apparatus according to claim 2, wherein in the wait mode forthe mount object, based on a cancel of the wait mode, the control deviceresumes the operations of the component feed device and componenttransfer device without a judgment by a worker.
 4. An electroniccomponent mounting apparatus according to claim 3, wherein the controldevice detects the halt condition on the basis of output informationfrom encoders (1073A, 1073B, 1083) equipped at the component feed deviceand the component transfer device.
 5. A power supply control methodcarried out by an electronic component mounting apparatus which mountselectronic components (111) on a mount object (105), the power supplycontrol method comprising: detecting an operation halt condition becauseof the other reason than a shutoff of power supply to the electroniccomponent mounting apparatus; and after the detection, shutting off asupply of a driving electric power to a part in the operation haltcondition constituting the electronic component mounting apparatus whilea supply of an operation control electric power is maintained to thepart of the electronic component mounting apparatus.
 6. A power supplycontrol method according to claim 5, when the detected operation haltcondition is a wait mode for the mount object to be carried to theelectronic component mounting apparatus, based on a cancel of the waitmode, operation of the electronic component mounting apparatus isresumed without a judgment by a worker.